A pneumatic suction device including a suction nozzle connected to a suction unit and at least one air amplification module located in at least one hose for connecting said suction nozzle to the suction unit. The at least one air amplification module includes at least two air amplifiers operating according to a Coanda effect.

A hand-held turbine cleaning tool includes front and rear housings coupled to each other, an outlet at one end of the tool, and a top of the tool at an opposed end. The outlet is directed in a first direction away from the top. An inlet is disposed between the outlet and the top and is also directed in the first direction. A diverter valve at the inlet is moveable between on and off positions. The on position directs water flowing into the inlet from the inlet, up to the top in a second direction opposite the first direction, and then down to the outlet in the first direction. A turbine at the top has a turbine shaft that extends outside the tool. An abrasive member is connected to the turbine shaft and is configured to rotate when water flows from the inlet to the outlet.

A high torque dual speed turbine rotor for a lightweight hand held tool for grinding and polishing or for use with a spindle mounted pneumatic machine. The high torque dual speed turbine rotor includes a two-piece shaft with flow control screw disposed within the shaft. The shaft includes a first set of hollow openings, at a first position from one end of the shaft, in fluid communications with a first annular chamber of a rotor. There is also a second set of hollow opening, at a second position from the one end of the shaft, in fluid communications with a second annular chamber of the rotor. The flow control screw moves inside a threaded axial bore of the shaft from an open position inside the axial bore to the closed position corresponding to the second set of hollow openings.

A compressed air-driven tool having an electromagnetically operated control element (27) for controlling a pneumatic control circuit in order to maintain a load-independent torque at a constant rotational speed. The tool includes a principal valve (5), which arranged in a drive housing (1) in a manner displaceable by the supplied compressed air against the force of a helical spring (13), and a generator (43), which is mounted on the shaft (49) of a turbine wheel (51). The rotational speed of the shaft (49) is measured with a speed sensor (75) and the supply of compressed air to the principal valve (5) is controlled in the event of a drop in rotational speed as a consequence of a load.

An improved structure of water mill has a body provided with a handle part, a body part, a working head base and a pressing control switch. The handle part is provided with an intake passage, an exhaust passage, and a water inlet reversing passage. By triggering the pressing control switch, a high-pressure gas is guided into the intake passage and the body to drive the water grinder. A water pump gas outlet is provided with a double sleeve tube connected to a sealed water storage tank. The discharged high-pressure gas is guided into the sealed water storage tank through the outer tube of the double sleeve tube, so that the stored water is pressed back to the double sleeve tube and is simultaneously guided into the water inlet reversing passage. Finally, the water is guided out to the working head base, with simultaneous grinding and water cooling.

A portable and transportable die cavity modifying machine having a base carrying a carriage adjustable along one axis, e.g., a generally horizontal axis, and a machining head adjustable along another axis, e.g., a generally vertical axis, for modifying a die cavity of a stamping die in a manner that prevents blank or slug pulling during stamping press operation. The machine includes a stop that is adjustably connected to the carriage. The stop is configured to limit movement of the machining head along the generally vertical axis. The machine may also feature a vibration isolator that is used with the stop to prevent noise and vibration that result from movement of the machining head in relation to the stop. Additionally, the machine may include an optical device capable of capturing an image of the die cavity defining sidewall as the rotary grinding bit machines the elongate slug retention groove.

A pneumatic tool comprises a housing, a cylinder and a pneumatic assembly. The housing includes a compartment, an air entrance channel interconnecting with the compartment, and an air exit channel interconnecting with the compartment. The air exit channel includes an air incoming end, an air outgoing end, and a flow-guiding incline disposed on one side of the compartment, which faces the cylinder, and connected with the rim of the air exit channel partially or completely. The cross section of the air incoming end is larger than the cross section of the air outgoing end.

The air incoming end guides the high-speed and high-pressure air to the air exit channel to increase the flow rate at which the high-speed and high-pressure air flows out of the air exit channel. Thereby is solved the operational abnormalities caused by that the conventional pneumatic polishing-grinding machine cannot fully exhaust high-speed and high-pressure air.

A pneumatic device includes a casing unit defining a first chamber, a receiving space and a front space; a cylinder movably received in the receiving space, defining a second chamber and a releasing room, and having an air passage unit and an annular groove; and a hollow piston rod in sliding engagement with the cylinder, and having an inlet channel, a communicating room and an air hole unit. The cylinder and the piston rod are movable to change between a pneumatic state, where the air hole unit is communicated with the inlet channel, the annular groove, the communicating room and the second chamber, and an air discharging state, where the air passage unit is communicated with the second chamber, the receiving space and the releasing room.

A dust removal assembly for use with a disc grinder includes a base portion with a member defining a major surface, a wall extending at least partially along an outer periphery of the major surface, an exhaust port contained within the wall, and a first ledge positioned proximate the exhaust port extending along the major surface. A top plate, attachable to the wall, includes a second ledge extending downward from a lateral edge toward the base portion such that the first ledge and the second ledge are positioned proximate to, and extend horizontally parallel to, one another. Both the first ledge and the second ledge are configured to permit a circular disc to travel therebetween. A compartment in fluid communication with an exhaust port is defined by the first ledge, the wall and a minor surface positioned below the major surface.

The present invention relates broadly to pneumatic tools, such as a sander, that provide an optimum output speed and has significant stall torque to reduce the risk of the tool from stalling during use. The tool includes a coupled gear set that drives an output accessory, such as an abrasive pad, at an optimum speed without loss of power or power reduction, and with an amplified stall torque. The coupled gear set may include a first gear set that functions as a speed reducer, and a second gear set that functions as a speed increaser.